High speed spiral door
12 December 2012
HÃ¶rmann's high speed spiral door was originally developed to replace the traditional two door solution of of a high speed curtain door, for frequent daytime access, with a sectional outer door for night-time security.
The company says: "Excellent insulation and high speed operation, of up to 2.5 metres per second, are combined in this door. Completely re-designed, this new version is a technical leap forward since it uses CFC PU foam to give strength while also providing both thermal and acoustic insulation." The 42mm thick insulation is the same as that used in the highly popular SPU sectional door, where a single panel has a Thermal U value of 0.5 W/m2K. For a complete spiral door, with a surface area of 25m2 a U value of only 1.95 W/m2K is achieved.